DUCTING OVERVIEW
Use ductwork to connect the unit to the supply and return outlets in the wine cellar. Use only insulated ductwork to minimize
cooling losses, prevent sweating, and reduce noise. Use ductwork on the condenser section to redirect or absorb sound, bring in
outside air to the unit inlet, and/or exhaust the hot air.
Note:
Do not exceed a total of 25 feet for each length of ductwork run
and a combined total of 50 feet for both the supply and return lengths.
Avoid crimping the flexible ducts. This reduces airflow, causing the unit to operate improperly. Be sure all ductwork and outer
surfaces in contact with the airflow are insulated and have a vapor barrier on the outside. Uninsulated supply and return ducts may
cause bare, exposed metal surfaces to sweat, further degrading the insulation and equipment cooling capacity.
Do not allow sharp turns to squeeze or decrease the inside
diameter of the flexible ducting.
General duct recommendations:
• Provide support for the flexible duct to prevent sags and bends.
• Magnum 9000 and 12000 duct size: 14” supply and return
• Register size: 14” x 14”
• Filter size: 14” x 14” (MERV 4)
• Stretch out the duct to make a smoother interior which reduces air resistance.
• Maximum duct length is 25 feet.
• For 90° bends, use a 90° adjustable elbow.
• No more than two 90° bends on each duct. Sweep 90° bends are recommended rather than sharp 90° bends.
• Generously apply duct sealant to all metal seams to fill in gaps that can leak air. Allow sealant to dry until
firm to the touch before applying fiberglass insulation.
• Do not squeeze or reduce the inside diameter of the ducts, as this will reduce airflow.
• Use short and straight ductwork where possible.
• Check that all fan blades move freely.
• Keep air paths free of loose foreign objects and debris.
• Locate the supply and return grilles inside the cellar to create an airflow pattern that maximizes air
circulation in the room. Avoid short circulation of the air.
DO NOT:
• Install through-the-wall return air grilles at floor level where they will collect dust from the floor.
• Locate the supply or return air grille where it is blocked by bottles, boxes, or cases.
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08/09/21
